package com.ruoyi.project.common;

import com.google.code.kaptcha.Producer;
import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.exception.user.CaptchaException;
import com.ruoyi.common.utils.MessageUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.sign.Base64;
import com.ruoyi.common.utils.uuid.IdUtils;
import com.ruoyi.framework.aspectj.lang.annotation.Anonymous;
import com.ruoyi.framework.manager.AsyncManager;
import com.ruoyi.framework.manager.factory.AsyncFactory;
import com.ruoyi.framework.redis.RedisCache;
import com.ruoyi.framework.web.domain.AjaxResult;
import com.ruoyi.project.system.service.ISysConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

import static com.ruoyi.common.constant.CacheConstants.DT_RUN;

/**
 * 验证码操作处理
 */
@RestController
public class CaptchaController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private RedisCache redisCache;

    @Autowired
    public RedisTemplate<String, String> redisTemplate;

    // 验证码类型
    @Value("${ruoyi.captchaType}")
    private String captchaType;

    @Autowired
    private ISysConfigService configService;

    /**
     * 获取缓存消息
     */
    @Anonymous
    @GetMapping("/value/{key}")
    public String value(@PathVariable("key") String key) {
        return (redisTemplate.boundValueOps(DT_RUN + key).get());
    }

    /**
     * 设置缓存消息
     */
    @Anonymous
    @PutMapping("/value/{key}/{value}")
    public void setValue(@RequestParam("key") String key, @RequestParam("value") Object value) {
        redisTemplate.boundValueOps(DT_RUN + key).set(value.toString());
    }

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult getCode() throws IOException {
        AjaxResult ajax = AjaxResult.success();
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        ajax.put("captchaEnabled", captchaEnabled);
        if (!captchaEnabled) {
            return ajax;
        }
        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;
        String capStr, code = null;
        BufferedImage image = null;
        // 生成验证码
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else if ("char".equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }
        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return AjaxResult.error(e.getMessage());
        }
        ajax.put("uuid", uuid);
        ajax.put("img", Base64.encode(os.toByteArray()));
        return ajax;
    }

    @GetMapping("/checkVerifyCode")
    public AjaxResult checkVerifyCode(String key, String code) {
        String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + key;
        String captcha = redisCache.getCacheObject(verifyKey);
        if (StringUtils.isEmpty(captcha)) {
            return AjaxResult.error(4002, "验证码失效");
        }
        redisCache.deleteObject(verifyKey);
        if (!code.equalsIgnoreCase(captcha)) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(key, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.error")));
            throw new CaptchaException();
        }
        return AjaxResult.success();
    }

}
